NON-ISOLATED DC/DC CONVERTERS
10.8 Vdc - 13.2 Vdc Input, 1.23, 2.5, 3.3, -12 Vdc/6, 1.5, 1.5, 2 A
Sep. 22, 2009
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
RoHS Compliant
•
•
•
•
•
Low Cost
Under Voltage Lockout
OCP/SCP
Remote On/Off
Wide Operating Temperature Range
SRXA-40AQ1L
Features
•
•
•
•
•
•
Non-Isolated
High Efficiency
Fixed Frequency
High Power Density
Wide Input
Rev.C
Class 1, Category 2, Non-Isolated DC/DC Converter (refer to IPC-9592)
Applications
•
•
•
Networking
Computers and peripherals
Telecommunications
Description
The Bel SRXA-40AQ1L is part of the non-isolated dc/dc converter Power Module series. The modules use a
SMT package. These converters provide 4 outputs: 1.23 Vdc/6 A, 2.5 Vdc/1.5 A, 3.3 Vdc/1.5 A and -12 Vdc/2 A
over a wide range of input voltage (Vin = 10.8 - 13.2 Vdc).The efficiency is typically 91% @ 12Vin at full load.
Part Selection
Output Voltage
1.23/ 2.5/ 3.3/ -12 Vdc
Input Voltage
10.8 Vdc - 13.2 Vdc
Max. Output
Current
6/ 1.5/ 1.5/ 2 A
Max. Output
Power
40 W
Typical
Efficiency
91%
Model Number
Active Low
SRXA-40AQ1L
Notes:
Add “G” suffix at the end of the model number to indicate Tray Packaging.
Part Number Explanation
S R XA – 40 A Q1 L
1 2
3
4
5
6
7
1---Surface mount
2---RoHS 6, change “R” to “7” means RoHS 5
3---Series name
4---Series code
5--- Narrow input range (10.8-13.2V)
6---Output voltage, Quad
7---Enable, active low
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302
•
Tel 201-432-0463
•
Fax 201-432-9542
•
www.belfuse.com
1
NON-ISOLATED DC/DC CONVERTERS
10.8 Vdc - 13.2 Vdc Input, 1.23, 2.5, 3.3, -12 Vdc/6, 1.5, 1.5, 2 A
Sep. 22, 2009
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
Min
-0.3
-0.3
-40
-55
Typ
-
-
-
-
Max
15
15
85
125
Unit
V
V
°C
°C
Notes
Absolute Maximum Ratings
Parameter
Continuous non-operating Input
Voltage
Remote On/Off
Ambient Temperature
Storage Temperature
Note:
Ratings used beyond the maximum ratings may cause a reliability degradation of the converter or may
permanently damage the device.
Input Specifications
Parameter
Operating Input Voltage
Input Current (full load)
Input Current (no load)
Remote Off Input Current
Input Reflected Ripple Current
(rms)
Input Reflected Ripple Current
(pk-pk)
I t Inrush Current Transient
Turn-on Voltage Threshold
Turn-off Voltage Threshold
2
Min
10.8
-
-
-
-
-
-
-
-
Typ
12
-
80
10
10
50
-
10.5
9.5
Max
13.2
5
150
-
20
80
1
-
-
Unit
V
A
mA
mA
mA
Notes
Use a 1000uF AL-Cap on the input
mA
As
V
V
2
CAUTION: This converter is not internally fused. An input line fuse must be used in application.
Recommend a fast-acting fuse with maximum rating of 8A on system board. Refer to the fuse
manufacture’s datasheet for further information.
Note:
All specifications are typical at 25
°C
unless otherwise stated.
Output Specifications
Parameter
Output Voltage Set Point
Load Regulation
Line Regulation
Regulation Over Temperature
(-40deg.C-85deg.C)
Ripple and Noise (pk-pk)
Vo=1.23V
Vo=2.5V
Vo=3.3V
Vo=-12V
Ripple and Noise (rms)
Vo=1.23V
Vo=2.5V
Vo=3.3V
Vo=-12V
-
-
-
-
5
5
5
8
-
-
-
-
mV
mV
mV
mV
Min
-2
-
-
-
-
-
-
-
Typ
-
-
-
-
30
30
30
40
Max
2
1
1
1
-
-
-
-
Unit
% Vo,set
% Vo,set
% Vo,set
% Vo,set
mV
mV
mV
mV
Notes
Vin=12V, lout=half load
0-20MHz BW, minimum extra
output ceramic caps on output
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302
•
Tel 201-432-0463
•
Fax 201-432-9542
•
www.belfuse.com
2
NON-ISOLATED DC/DC CONVERTERS
10.8 Vdc - 13.2 Vdc Input, 1.23, 2.5, 3.3, -12 Vdc/6, 1.5, 1.5, 2 A
Sep. 22, 2009
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
Min
Vo=1.23V
Vo=2.5V
Vo=3.3V
Vo=-12V
0
0
0
0
-
-
-
-
Vo=1.23V
Vo=2.5V
Vo=3.3V
Vo=-12V
330
220
80
22
-
Vo=
1.23V
-
-
-
-
Vo=
2.5V
-
-
-
-
Vo=
3.3V
-
-
-
-
Vo=
-12V
-
-
-
Typ
-
-
-
-
150
1
8
-
-
-
-
-
50
-
50
-
50
-
50
-
50
-
50
-
200
-
200
-
Max
6
1.5
1.5
2
-
3
12
5
560
470
220
100
100
150
100
150
100
150
100
150
100
150
100
150
400
150
400
150
Unit
A
A
A
A
%Iout
As
mS
%
uF
uF
uF
uF
mV
uS
mV
uS
mV
uS
mV
uS
mV
uS
mV
uS
mV
uS
mV
uS
di/dt=0.5A/us, Vin=12.0Vdc,
Ta=25°C,minimum extra output
ceramic caps on output
2
Output Specifications (continued)
Parameter
Output Current Range
Notes
Output DC Current Limit
1
Short Circuit Surge Transient
Turn on Time
Overshoot at Turn on
Output Capacitance
Transient Response
△
V
Overshoot
50%~75%
of Max Load Settling Time
△
V
Overshoot
75%~50%
of Max Load Settling Time
△
V
Overshoot
50%~75%
of Max Load Settling Time
△
V
Overshoot
75%~50%
of Max Load Settling Time
△
V
Overshoot
50%~75%
of Max Load Settling Time
△
V
Overshoot
75%~50%
of Max Load Settling Time
△
V
Overshoot
50%~75%
of Max Load Settling Time
△
V
Overshoot
75%~50%
of Max Load Settling Time
Notes:
1. All outputs is shutdown latched when 3.3V, 2.5V, 1.23V output happen overload. Hiccup mode is
active during -12V output overload but 3.3V, 2.5V and 1.23V don’t be affected operating.
2. All specifications are typical at nominal input, full load at 25°C unless otherwise stated.
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302
•
Tel 201-432-0463
•
Fax 201-432-9542
•
www.belfuse.com
3
NON-ISOLATED DC/DC CONVERTERS
10.8 Vdc - 13.2 Vdc Input, 1.23, 2.5, 3.3, -12 Vdc/6, 1.5, 1.5, 2 A
Sep. 22, 2009
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
Min
-
-
-
Typ
91
300
14
TBD
Max
-
-
-
Unit
%
kHz
g
-
Calculated Per Bell Core SR-332
(Io=80%load, T
a
= 25
°C,
9
FIT=10 /MTBF)
Notes
Vin=12.0V, full load
General Specifications
Parameter
Efficiency
Switching Frequency
Weight
FIT
Dimensions
Inches (L
×
W
×
H)
Millimeters (L
×
W
×
H)
1.77 x 0.90 x 0.49
45.00 x 22.86 x 12.39
-
Note:
All specifications are typical at 25
°C
unless otherwise stated.
Efficiency Data
SRXA-40AQ1L
90.0%
85.0%
efficiency
10.8V
12V
13.2V
80.0%
75.0%
70.0%
10% load
25% load
50% load
output current
75% load
full load
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302
•
Tel 201-432-0463
•
Fax 201-432-9542
•
www.belfuse.com
4
NON-ISOLATED DC/DC CONVERTERS
10.8 Vdc - 13.2 Vdc Input, 1.23, 2.5, 3.3, -12 Vdc/6, 1.5, 1.5, 2 A
Sep. 22, 2009
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
Thermal Derating Curves
The thermal reference point is shown above. For reliable operation this temperature should not exceed 110°C.
The output power of the module should not exceed the rated power for the module.
Derating curve under normal input
Maximum junction temperature of semiconductors derated to 120 degree C.
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302
•
Tel 201-432-0463
•
Fax 201-432-9542
•
www.belfuse.com
5
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